{
  "schemaVersion": 1,
  "productId": "toshiba-n300-pro-hdwg51gxzstb-16tb",
  "exactMpn": "HDWG51GXZSTB",
  "runId": "buying-research-full-grok-20260911",
  "recordedAt": "2026-09-11T08:37:38.338915+00:00",
  "subject": {
    "sha256": "ebd6d6235e2b210e9adf9fb08956354814e187d3f9e38c608788b92cf554ea87",
    "hashKind": "research-payload-sha256",
    "algorithm": "SHA-256 of UTF-8 JSON with recursively sorted object keys, no optional whitespace, Unicode unescaped; remove only top-level provenance, reviewedAt, reviewedBy, editorialStatus."
  },
  "actors": [
    {
      "id": "legacy-qnap_research",
      "label": "GPT-5.6 Sol",
      "provider": "openai",
      "model": "gpt-5.6-sol",
      "effort": "xhigh",
      "agentRoleName": "qnap_research",
      "identityBasis": "Verified dispatch model selection and matching dated run report; not a provider-side attestation.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md"
      ]
    },
    {
      "id": "legacy-hdd_research",
      "label": "GPT-5.6 Sol",
      "provider": "openai",
      "model": "gpt-5.6-sol",
      "effort": "xhigh",
      "agentRoleName": "hdd_research",
      "identityBasis": "Verified dispatch model selection and matching dated run report; not a provider-side attestation.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md"
      ]
    },
    {
      "id": "legacy-other_nas_research",
      "label": "GPT-5.6 Sol",
      "provider": "openai",
      "model": "gpt-5.6-sol",
      "effort": "xhigh",
      "agentRoleName": "other_nas_research",
      "identityBasis": "Verified dispatch model selection and matching dated run report; not a provider-side attestation.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md"
      ]
    },
    {
      "id": "legacy-codex-root",
      "label": "GPT-6 (Codex)",
      "provider": "openai",
      "model": null,
      "modelFamily": "GPT-6",
      "effort": null,
      "agentRoleName": "root",
      "identityBasis": "Codex host model family confirmed; exact model variant/effort not preserved in the product audit. Unknown fields remain null.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md",
        "reports/buying-research-all-products-20260910/browser-acceptance.json"
      ]
    },
    {
      "id": "b05-grok",
      "label": "Grok 4.6",
      "provider": "xai",
      "model": "grok-4.6",
      "effort": "xhigh",
      "identityBasis": "Verified execution receipt",
      "sessionId": "01a08f27-b2a6-7234-b0ef-bc62f3e0ce36"
    },
    {
      "id": "current-codex-root",
      "label": "GPT-6 (Codex)",
      "provider": "openai",
      "modelFamily": "GPT-6",
      "model": null,
      "effort": null,
      "identityBasis": "Host model family confirmed; exact variant and effort not asserted."
    }
  ],
  "events": [
    {
      "id": "legacy-20260910-1",
      "actorId": "legacy-hdd_research",
      "role": "research-and-self-review",
      "scope": "research and self-review",
      "legacyLabel": "/root/hdd_research — research and self-review",
      "reviewedAt": "2026-09-10T02:57:11.326059+00:00",
      "subjectSha256": "43ded037a405c0be2493517d675c4f736068a0c07acf0788123714a29ba08b85",
      "subjectHashKind": "raw-file-sha256",
      "recordedAt": "2026-09-11T05:49:51.110527+00:00",
      "status": "historical-record",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/editorial-decisions.json"
      ]
    },
    {
      "id": "legacy-20260910-2",
      "actorId": "legacy-other_nas_research",
      "role": "independent-evidence-review",
      "scope": "independent evidence review",
      "legacyLabel": "/root/other_nas_research — independent evidence review",
      "reviewedAt": "2026-09-10T02:57:11.326059+00:00",
      "subjectSha256": "43ded037a405c0be2493517d675c4f736068a0c07acf0788123714a29ba08b85",
      "subjectHashKind": "raw-file-sha256",
      "recordedAt": "2026-09-11T05:49:51.110527+00:00",
      "status": "historical-record",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/owners/nas_other/reviews-by-nas-other/toshiba-n300-pro-hdwg51gxzstb-16tb.json"
      ]
    },
    {
      "id": "legacy-20260910-3",
      "actorId": "legacy-codex-root",
      "role": "integration-and-page-review",
      "scope": "integration and local page review",
      "legacyLabel": "/root — integration and local page review",
      "reviewedAt": "2026-09-10T02:57:11.326059+00:00",
      "subjectSha256": "43ded037a405c0be2493517d675c4f736068a0c07acf0788123714a29ba08b85",
      "subjectHashKind": "raw-file-sha256",
      "recordedAt": "2026-09-11T05:49:51.110527+00:00",
      "status": "historical-record",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/editorial-decisions.json"
      ]
    },
    {
      "actorId": "b05-grok",
      "role": "research-and-self-check",
      "status": "completed",
      "subjectSha256": "ebd6d6235e2b210e9adf9fb08956354814e187d3f9e38c608788b92cf554ea87",
      "researchedAt": "2026-09-11"
    },
    {
      "actorId": "current-codex-root",
      "role": "independent-review",
      "status": "completed",
      "subjectSha256": "ebd6d6235e2b210e9adf9fb08956354814e187d3f9e38c608788b92cf554ea87",
      "reviewedAt": "2026-09-11T08:37:38.338915+00:00",
      "scope": "Exact HDWG51GXZSTB manufacturer column, capacity/revision identity, material warranty/temperature/workload footnotes; bounded related-test applicability and dated merchant retention. No exact-MPN original measurement is claimed; partial coverage and existing noindex preserved.",
      "evidenceChecks": [
        "Parent visually checked exact assigned columns in original Toshiba sales sheet and relevant footnotes; no unreported startup current/sleep power/seek acoustics invented.",
        "July2026 N300 target columns were independently read on pages3–5 and all footnotes on page7; capacity-specific8/12-bay classes and180TB/year retained. Prior March2025 N300Pro16TB column and pages3/4/5/7 checked separately:24bays,300TB/year,512MB,281MB/s,1.2Mhours,1e14 UER,7.48/4.14W,5years.",
        "Footnotes explicitly separate40°C ambient workload from average HDA surface≤40°C reliability conditions; 5–60°C operation is not an MTTF guarantee. Annualization follows source formula.",
        "Related original evidence is labelled by actual capacity/revision, never copied as exact-SKU measurements; original parent Tom12TB/20TB label photos and official bulk-to-retail bridge checked, article12TB14TB-code typo retained as conflict.",
        "Prior merchant prices/dates unchanged, blocked current attempts and video/full-chart gaps explicit; no new live quote or new indexing approval."
      ]
    }
  ],
  "sourceOrigins": {
    "status": "not-inferred-per-source",
    "explanation": "The recorded page researchers/reviewers do not prove who originally discovered or reread each inherited source. Source-level historical author attribution is unknown unless a specific source audit establishes it."
  },
  "sources": [
    {
      "id": "official-datasheet",
      "title": "Toshiba N300 Pro sales sheet 2025-03-31 (HDWG51GXZSTB column)",
      "url": "https://storage.toshiba.com/docs/support-docs/n300-pro-sales-sheet_english_03312025.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "16TB retail-packaging column HDWG51GXZSTB on the 31 March 2025 sheet. Closing-page footnotes 6–7 (2025.03.19-2453-R2.1): same 40°C ambient workload annualization and HDA surface ≤40°C MTTF/warranty caveat. Up to 24 bays; footnote 4 host compatibility varies.",
      "readAction": "opened",
      "readScope": "HDWG51GXZSTB column plus independently viewed closing-page footnotes 6–7 (same 40°C ambient/HDA conditions).",
      "readingActorId": "b05-grok",
      "observedAt": "2026-09-11T08:14:44Z",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "d11801b0ba56fb4694eafc0dc23639e25538ace86cb8687c78189bb16a5c5d02",
          "mimeType": "application/pdf",
          "sourceUrl": "https://storage.toshiba.com/docs/support-docs/n300-pro-sales-sheet_english_03312025.pdf",
          "description": "N300 Pro sheet that still publishes HDWG51GXZSTB"
        },
        {
          "sha256": "49e04ddb8142b552900f84012030cdb6d0d437c5c0e9ea029bd952144bc91f5c",
          "mimeType": "image/png",
          "sourceUrl": "https://storage.toshiba.com/docs/support-docs/n300-pro-sales-sheet_english_03312025.pdf",
          "description": "N300 Pro 2025 sheet closing page footnotes 6–7 (2025.03.19-2453-R2.1)"
        }
      ]
    },
    {
      "id": "official-current-page",
      "title": "Toshiba N300 Pro product page",
      "url": "https://storage.toshiba.com/consumer-hdd/internal/n300-pro",
      "kind": "official",
      "checkedAt": "2026-09-10",
      "locator": "Current page and 2026 sheet use a newer 16TB retail MPN; used to document the revision boundary only.",
      "readAction": "opened",
      "readScope": "Readable fetch plus saved HTML; family maxima 550 TB/year and 2.5M MTTF",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "bb292ff02201025331d5aeec25e777c09dbd43b19e317d955edfea95a28e0407",
          "mimeType": "text/html",
          "sourceUrl": "https://storage.toshiba.com/consumer-hdd/internal/n300-pro",
          "description": "N300 Pro product page HTML 2026-09-11"
        }
      ]
    },
    {
      "id": "merchant-b-h-1",
      "title": "B&H: HDWG51GXZSTB historical US listing",
      "url": "https://www.bhphotovideo.com/c/product/1759585-REG/toshiba_hdwg51gxzstb_n300_nas_pro.html",
      "kind": "merchant",
      "checkedAt": "2026-08-30",
      "locator": "Catalog record dated 2026-08-30: exact MPN, new condition, seller status retailer, availability in-stock. Historical catalog reference price $558.99. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.",
      "readAction": "blocked",
      "readScope": "2026-09-11 live PDP reread failed or was not a usable selected offer; historical row reused without a new timestamp",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "merchant-amazon-2",
      "title": "Amazon: HDWG51GXZSTB historical US listing",
      "url": "https://www.amazon.com/dp/B09TQ6ZZPV",
      "kind": "merchant",
      "checkedAt": "2026-08-31",
      "locator": "Catalog record dated 2026-08-31: exact MPN, new condition, seller status marketplace-unverified, availability listed. No historical price adopted for this URL. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.",
      "readAction": "blocked",
      "readScope": "2026-09-11 live PDP reread failed or was not a usable selected offer; historical row reused without a new timestamp",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "official-current-sheet",
      "title": "Toshiba N300 Pro sales sheet TAEC-2839 (2026-07)",
      "url": "https://storage.toshiba.com/docs/product-datasheets/TAEC-2839_N300Pro_Sales-Sheets-Updates_LowRes-Locked.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "Current 16TB retail column is HDWG81GXZSTB (1024 MB, 294 MB/s, 550 TB/year, 2.5M MTTF). Do not copy onto HDWG51GXZSTB.",
      "readAction": "opened",
      "readScope": "Rendered 16TB column HDWG81GXZSTB on TAEC-2839",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "3567f5dbbb82f8a87150f19a4354cde717ba1864b515cb5d7238b363c28a6c89",
          "mimeType": "application/pdf",
          "sourceUrl": "https://storage.toshiba.com/docs/product-datasheets/TAEC-2839_N300Pro_Sales-Sheets-Updates_LowRes-Locked.pdf",
          "description": "Current N300 Pro sheet linked from product page, 2026-07-31"
        }
      ]
    },
    {
      "id": "official-naslink",
      "title": "NASLink firmware white paper (April 1, 2026)",
      "url": "https://storage.toshiba.com/docs/support-docs/naslink_toshiba_n300_whitepaper_en.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "Family firmware description; N300 Pro page also cites NASLink. Not an exact-MPN benchmark.",
      "readAction": "opened",
      "readScope": "pdftotext; abstract and §1 read",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "97094b64dab9c60f4491642266812982aa02b31830113d80a17859145e4146a9",
          "mimeType": "application/pdf",
          "sourceUrl": "https://storage.toshiba.com/docs/support-docs/naslink_toshiba_n300_whitepaper_en.pdf",
          "description": "NASLink white paper April 1, 2026"
        }
      ]
    },
    {
      "id": "related-toms-n300-pro-12-20",
      "title": "Tom's Hardware: N300 Pro 12TB and 20TB review",
      "url": "https://www.tomshardware.com/pc-components/hdds/toshiba-n300-pro-12tb-20tb-hdd-review",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Tested HDWG51EXZSTB 12TB and HDWG62AXZSTB 20TB. Features plus performance page 2; chart pixels not transcribed.",
      "readAction": "opened",
      "readScope": "Round 1 article HTML. Round 2 original label photos viewed; 12TB table MPN not adopted.",
      "readingActorId": "b05-grok",
      "observedAt": "2026-09-11T07:37:25Z",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "e4c06b5dfcac0d0a76d908d5ffda0df2233f013585fd230ebd6d9ea8f70b3ffc",
          "mimeType": "image/jpeg",
          "sourceUrl": "https://cdn.mos.cms.futurecdn.net/D2Xb8w2VZC6t7AWpmULmag.jpg",
          "description": "Tom's original 12TB N300 Pro label photo; HDWG51C / HDWG51CUZSVB"
        },
        {
          "sha256": "8df1f781f484a3ac2849cca62deaadf2cccad12d0bb9125af125cc8c700f99d9",
          "mimeType": "image/jpeg",
          "sourceUrl": "https://cdn.mos.cms.futurecdn.net/8tysBrFqQQxywWHqfoYmsg.jpg",
          "description": "Tom's original 20TB N300 Pro label photo; HDWG62A / HDWG62AUZSVB firmware 0103"
        },
        {
          "sha256": "e71969b19bda1d5ea4c7fad04127badf9e173cd9ec910c5b22ea680de3a39b3a",
          "mimeType": "application/json",
          "sourceUrl": "https://www.tomshardware.com/pc-components/hdds/toshiba-n300-pro-12tb-20tb-hdd-review",
          "description": "Parent identity reading of the two photos; Grok independently viewed the same originals"
        }
      ]
    },
    {
      "id": "related-toms-hierarchy",
      "title": "Tom's Hardware HDD Benchmarks Hierarchy",
      "url": "https://www.tomshardware.com/features/hdd-benchmarks-hierarchy",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "N300 Pro 12TB Seq 290 / Copy 89 / 356 IOPS / 6.58 W; 20TB Seq 261 / Copy 98 / 363 IOPS / 7.67 W. Not HDWG51GXZSTB.",
      "readAction": "opened",
      "readScope": "Hierarchy table rows for N300 18TB and N300 Pro 12/20TB; tool mtwlakoyh5f9w5",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "related-toms-n300-18tb",
      "title": "Tom's Hardware: Toshiba N300 18TB HDD review",
      "url": "https://www.tomshardware.com/pc-components/hdds/toshiba-n300-18tb-hdd-review",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Spec table lists HDWG51GXZSTB as an N300 Pro 16TB comparator, not the drive Tom's measured (HDWG51JXZSTA).",
      "readAction": "opened",
      "readScope": "Readable fetch of features + /2; tool mtwl6uipt0kyug / mtwl8h5af2tz9e",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    }
  ],
  "coverage": {
    "productId": "toshiba-n300-pro-hdwg51gxzstb-16tb",
    "roundStatus": "部分完成",
    "dimensions": [
      {
        "id": "identity",
        "status": "已核实",
        "evidenceIds": [
          "ev-pro-2025-column"
        ],
        "remainingFields": [
          "Confirm delivered label matches the full retail suffix, not bulk."
        ],
        "nextStep": "Keep bulk and replacement MPNs off this page's performance claims.",
        "reusedVsReread": "Exact column reread on TAEC-2839 or 2025 Pro sheet."
      },
      {
        "id": "specifications",
        "status": "已核实",
        "evidenceIds": [
          "ev-pro-2025-column"
        ],
        "remainingFields": [
          "Startup current, standby/sleep power, seek acoustics still unpublished."
        ],
        "nextStep": "Do not fill unknowns from another capacity.",
        "reusedVsReread": "Round 3: footnotes 6–7 from TAEC-2839 p7 / Pro 2025 closing page added to workload, MTTF, warranty and operating-temperature notes."
      },
      {
        "id": "software-limits",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-naslink"
        ],
        "remainingFields": [
          "Up-to-24-bay rating is not a NAS HCL (footnote 4)."
        ],
        "nextStep": "Buyer must check the NAS vendor list for this MPN.",
        "reusedVsReread": "NASLink white paper opened; family only."
      },
      {
        "id": "direct-measurement",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "No adopted original test of HDWG51GXZSTB."
        ],
        "nextStep": "Watch for an exact-MPN lab with method and charts.",
        "reusedVsReread": "Exact-MPN searches plus known 2026-09-10 leads reread."
      },
      {
        "id": "related-experience",
        "status": "来源冲突",
        "evidenceIds": [
          "ev-toms-pro-12-20"
        ],
        "remainingFields": [
          "12TB article table HDWG51EXZSTB vs photo HDWG51CUZSVB unresolved as a table error; official bulk/retail pair is HDWG51CXZSTB/HDWG51CUZSVB.",
          "Performance charts on Tom's page 2 not reread in the identity pass."
        ],
        "nextStep": "Do not transfer 12/20TB results to HDWG51GXZSTB.",
        "reusedVsReread": "Round 2 viewed original label photos and 2025 12TB official column."
      },
      {
        "id": "us-new-pdp",
        "status": "部分覆盖",
        "evidenceIds": [],
        "remainingFields": [
          "2026-09-11 live PDPs blocked; historical B&H/Amazon/Newegg/Best Buy rows not refreshed."
        ],
        "nextStep": "Parent browser pass on B&H, Adorama, Newegg and Amazon exact SKUs.",
        "reusedVsReread": "Historical offers retained with original checkedAt."
      },
      {
        "id": "buying-judgment",
        "status": "已核实",
        "evidenceIds": [
          "ev-pro-2025-column"
        ],
        "remainingFields": [
          "Bay-class copy now matches the official up-to-24-bay column; indexing still blocked by missing exact-MPN original test."
        ],
        "nextStep": "Independent review; do not treat this draft as approval.",
        "reusedVsReread": "Judgment rewritten around the reread column and related-test boundary."
      },
      {
        "id": "video",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "Exact-MPN videos not given complete ASR/frames. Known related clips include 6UFvvdKueVo (wrong 16TB MPN) and d907R8yADuI (HDWG51G)."
        ],
        "nextStep": "Do not invent listening claims. Parent export only if an exact-MPN clip is later identified.",
        "reusedVsReread": "Not marked blocked; not fabricated."
      }
    ]
  },
  "retiredRecords": [],
  "originalMaterial": {
    "status": "per-source-records",
    "note": "Available original captures are retained locally with SHA-256. Public records contain source URLs and locators; they do not reproduce full third-party content. An absent capture is not a claim of a saved original."
  }
}